United States Department of the Interior, Fred A. Seaton, Secretary 

 Fish and Wildlife Service, Arnie J. Suomela, Commissioner 



PHOTOGRAPHIC DEVICE FOR ACCURATELY MEASURING FISH 



By 



Clifford W . Long 

 Fishery Research Biologist 



and 



Raymond A. Arzylowicz 

 Fishery Aid 



Bureau of Commercial Fisheries 



Special Scientific Report- -Fisheries No. 228, 



Wa shington, D . C . 

 November 1957 



